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BBK problem
Posted: Thu Aug 02, 2012 5:55 pm
by ILLEGALLIFESTYLZ311
Okay so i got the NIKASIL BBK for my 01 elite sr. And apon putting the piston onto the rod and putting it together the motor wouldnt turn over. After further inspection i relized that the bottom of the piston skirt is hitting on the crank causing it to stop. Everything fits on it and i dont have any other problems but i was just wondering if anyone else has had this problem? Maybe the seller gave me the wrong piston?
Re: BBK problem
Posted: Fri Aug 03, 2012 7:57 pm
by maddog
What size bore kit, anything larger than a 44.7mm on the crank and the cases need to get milled, you can cut the piston skirts= more psi.
Re: BBK problem
Posted: Fri Aug 03, 2012 11:48 pm
by ILLEGALLIFESTYLZ311
apparently its a 49mm bore but why does it need to get milled. the cylinder fits on fine. Tomorrow morning im going to mill the skirts down. Im milling them to be the same size as the stock piston. then tomorrow ill have this beast finally running.
Re: BBK problem
Posted: Sat Aug 04, 2012 1:55 pm
by ILLEGALLIFESTYLZ311
Sanded the piston this morning. took off about an 1/8 inch okk the bottom of the piston skirt and now it is the same clearence as the stock piston. Well i got her put back together and she runs now. Just idling at te moment
Re: BBK problem
Posted: Sat Aug 04, 2012 8:16 pm
by Mystic
did you chamfer the edges of the skirt after you cut it? if not the sharp edges can act as a squeegie and scrap all the oil off hte sides of the cylinder wall causing it to seize FYI
Re: BBK problem
Posted: Mon Aug 06, 2012 12:00 am
by ILLEGALLIFESTYLZ311
Yes i did
Re: BBK problem
Posted: Tue Aug 07, 2012 5:45 am
by kingkamehameha
ILLEGALLIFESTYLZ311 wrote:Okay so i got the NIKASIL BBK for my 01 elite sr. And apon putting the piston onto the rod and putting it together the motor wouldnt turn over. After further inspection i relized that the bottom of the piston skirt is hitting on the crank causing it to stop. Everything fits on it and i dont have any other problems but i was just wondering if anyone else has had this problem? Maybe the seller gave me the wrong piston?
What are you doing 90 on and getting 50mpg? Also the piston should not be hitting the crank like that if its stock crank
Re: BBK problem
Posted: Tue Aug 07, 2012 12:19 pm
by ILLEGALLIFESTYLZ311
idk my signature is just a saying. But yes it was the stock crank. I have no clue what the deal was but it works now that i shaved 3/16 off the bottom of the skirt. I just have to finish putting her back together and i can ride her. With the 24mm carb it disabled the oil pump so i just pulled off all the houses and capped off the fittings on the pump and im going to tie the oil line into the gas line and just run premix in both tanks. Ill try to get pictures up as soon as i can but for some reason it keeps saying the file is to big?